Buddecke



Feb. 21, 1956 H. BUDDECKE 2,735,250

METHOD OF AND MEANS FOR THE MANUFACTURE OF THREAD PACKS Filed Jan. 22,1952 2 Sheets-Sheet l /N VENTOR 1956 H. BUDDECKE ,73 50 METHOD OF ANDMEANS FOR THE MANUFACTURE OF THREAD PACKS Filed Jan. 22, 1952 2Sheets-Sheet 2 /NVENTOR United States Patent METHOD OF AND MEANS FOR THEMANU- FACTURE OF THREAD PACKS Heinrich Buddecke, Rheda, GermanyApplication January 22, 1952, Serial No. 267,683

Claims. (Cl. 53-7) The present invention concerns a method of and meansfor the manufacture of thread packs with the thread disposed in layersin back and forth arrangement, with separating means provided betweenthe end turns of the threads, forming the different layers as well ashelicoidal coiling of the thread on a pin of rectangular section andstripping-off of the coiled layer, with scale-like arrangement of theindividual thread coils one above the other.

In further developing this fundamental idea, preparation is effected insuch a way that, in accordance with the invention, the thread is wound,with the aid of a thread guide by the thread dispensing device rotatinground a coiling mandrel of rectangular section, the stripping off of thecoiled layer being effected by withdrawing the coiling mandrel while thecentral part is being held tight.

With a view to obtaining a scale-like overlapping arrangement of thethread windings, the upper portions of the layers are slid out of linewith the lower ones in the direction of coiling before stripping off.This sliding is effected by the relative displacement of an upper and alower member of the coiling mandrel in longitudinal direction, bringingthem nearer one to the other simultaneously.

After stripping off, the separating means in form of separating stripson both sides are placed above the thread returns and on a protrudingedge glued to the base frame or to the preceding separating strips. Bypreference, gluing is effected with the aid of a heated pressing memberon the separating strips employing a gluing medium sensitive to heat.Each stripped-off layer of thread is swung by 90 degs in its planerelative to the coiling mandrel, whereupon the subsequent layer ofthread is applied.

The mechanism employed for following this procedure is of correspondingdesign. The coiling mandrel is forkshaped, and each prong of the mandrelconsists of two sections, movable in relation to one anotherlongitudinally and also transversely of the longitudinal direction insuch a way, that the total circumference of the coiling mandrel isreduced measuring its vertical transverse plane, thereby facilitatingthe work of stripping off the coil.

With a depositing table which is given a turnof 90 degrees at the end ofevery coiling process, a detaining tongue co-operates which holds firmlythe center portion of the thread layer upon stripping off; furthermore,a double stamp, of which one portion presses the laterally fedseparating strips against the end turns-of the thread while the other,heated portion of the stamp acts upon those parts of the separatingstrips having glue thereon.

Further features of the invention will become evident from the claims inconjunction with the following description.

In the drawings, one manner of applying the invention is illustrated byway of example,

Fig. 1 being a diagrammatical view of ,the principal elements of thedevice in perspective;

Fig. 2 is a perspective view of the coiling mandrel in position forcoiling;

Fig. 3 is a perspective in stripping-olf position;

Fig. 4 is a vertical section through the coiling mandrel in variousoperating positions of the prongs;

Figs. 5 and 6 show a lateral view each of the front part of the prongsof the coiling mandrel in various operating positions, and

Fig. 7 shows in diagrammatical presentation the principal elements ofthe machine with their driving mech anism in which for the sake ofclearness some parts being arranged in somewhat other relative positionsfrom those shown as in Fig. l.

The thread to be coiled 1 (Fig. 1) comes from a bobbin 2 and is guidedover a thread tensioner with eye 3 to the thread guide 4. The threaddispensing device consisting of bobbin 2, the thread tensioner 3 andthreadguide 4 is arranged upon a disc 5 or its equivalent which isrotatably supported on a horizontal shaft 6, by preference upon a fixedbolt 7. Through apertures 8 in bolt 7 two prongs 9 of a coiling mandrel10 project, said mandrel being disposed in a horizontal plane, formingin section a rectangle with rounded narrow sides. Round this coilingmandrel the thread is wound helicoidally when turning disc 5, that thethread guide 4 is shifted in longitudinal direction in accordance withthe rotative movement. Instead of shifting the thread guide 4, acorresponding shifting of the coiling mandrel 10 in its horizontal planemay take place.

Each prong of the coiling mandrel, as may be seen from Fig. 2, consistsof an upper portion 11 and a lower portion 12. These two portions may beadjusted in relation to one another longitudinally by suitableintermediate members, in such a way, that coiled windings according toFig. 5 coiled in vertical planes, are brought into a slanting positionaccording to Fig. 6.

In order to bring about the inclined position of the windings withoutthe thread being pinched, the two prong elements are simultaneouslybrought nearer to one another during their relative longitudinaladjustment. Approach may be effected on one of the prongs or on both,and that in such a way, that the length of a circumference of thecoiling mandrel covered by a winding remains approximately unchanged.

Preferably, each prong element is given a sector-like section (Fig. 4).By hinges, guides and the like, two

view of the coiling mandrel outer edges 13 each of the prong elementsare made to maintain contact between them, while their relative approachor going apart transversely is produced by movement of the edges 14,which rest in the circle centers of the sector-shaped sections. Afterthe windings have been brought into inclined position, a depositingtable 15 (Fig. 1) located below the coiling mandrel is moved from belowupwards up to thread layer 16 while from the front a retaining tongue 17is moved above the thread layer and lowered upon the same, in such away, that the latter will be situated under soft pressure betweendepositing tablelS and retaining tongue 17, whilst the individualwindings are held firmly against thread derangement in the mannerillustrated in Fig. 6 in scale-like superposition.

Thereupon, the tension exerted on the thread layer by the coilingmandrel is relieved by suitable additional approach in transversedirection of the two members of one of the prongs 11, or both, and thecoiling mandrel is withdrawn on its level, and the coiled layer strippedoif in doing so, which is retained by the retaining tongue.

Now the separating strips 18 are brought above the end turns of thethread of the individual thread windings. These are wound in the form ofstrips on rollers 19 and are cut off to suitable length by blades 21.

Above the depositing table a pressing member has been provided, formedby an interior pressing member 22 and an exterior pressing member 23,both of which may be moved independently of one another up and down. Theinterior pressing member 22 is operative within the range of the endturns of the thread, and in going down it presses upon the innerportions of the separating strips which is provided with roughenings 24,pressing it down upon the end turns of the thread after it has suckedthe separating strips by way of suction holes of a sucking mechanism 20disposed within the pressing member, in such a way that the thread turnsare clamped in proper order, whereupon retaining tongue 17 is withdrawn.

Now the exterior pressing member 23 is lowered. It operates within therange of the outer portions 25 of the separating strips which on itslower side is provided with an adhesive. Such adhesive may be of thecurrent type which is moistened before pressing on or applied in theliquid state, respectively. By preference, an adhesive effective underheat is employed. In the lattercase, pressing member 23 is equipped withsuitable electric heating means 26, in such a way, that in pressing thepressing member 23 upon strip portions 25, the gluing of the separatingstrips upon the separating strips placed below of the previous threadlayer 16 or with the base frame 27 disposed on the lowermost end of thethread body is effected. To prevent the heat of the pressing member 23from passing onto the interior pressing member 22, the latter may beprovided with circular refrigeration or the like.

Now the depositing table 15 is given a partial turn by 90 degrees roundits vertical axis 28, whereby the freshly applied and glued separatingstrips 18 are brought to transverse position in relation to coilingmandrel 10, and that on the same level the previous thread layer hadoccupied after the latter had moved downward within the table by thethickness of one layer. During this, the thread runs in diagonaldirection toward one of the prongs of the coiling mandrel which, likethe thread guide 4 has been moved forward again. Now the coiling processfor the next following layer-of thread may be enacted, the procedure aspreviously described being repeated in doing so.

The base frame 27 is led towards the depositing table 15 over a guide 29by suitable drive connections, while the finished, coiled and gluedthread pack 3!} thrown out of the table, is passed along guiding'means31.

By a modification of the mechanism described, instead of a singlecoiling mandrel, a number of coiling mandrels corresponding to thenumber of thread layers in the finished thread pack may be employed. Inthis case the coiled thread layers may be composed to form a thread packin one operation, the separating strips being interposed simultaneously.1

The drive of the part mechanisms described is effected by an electricmotor 32 (Fig. 7) with belt connection 33 over a gear box 34 in whichthe motor energy with a suitable ratio of transmission is transferred toshafts 35, 36 and belt-drives 37, 38.

Belt drive 37, by way of a shaft'39, drives the thread releasing device2 to 4 carried on disc 5. The thread guide 4 is axially shiftedcorresponding to the winding progress of the thread 1 being wound, indoing so, its thread engaging within a bushing 41 revolving in unitywith disc 5. Bushing 41 is made to revolve independently with regard tothe thread guide slidable but not revolvable on disc 5, by way of thegears 42, 43 and gear teeth 44 on the rigid bolt 7, whereby the slidingof the thread guide is effected. Back and forth sliding of coilingmandrel is effected through drive shaft 36 which, at the proper moment,will swing out, through a cam 45, a lever 46 which at its upper end isconnected with coiling mandrel 10.

A shaft 47 is revolved by the belt drive 88, said shaft by way of a camdisc 48 and a lever 49 actuating the cutting-off mechanism 21 for theseparating strips 18. On shaft 47, earns 51, 52 are provided takingeffect on a lever 53 and a stirrup 54 which, at the proper moment, willmove up and down the interior pressing member 22 and the exteriorpressing member 23. The feeding of the separating strip 18 is effectedby a cam 55 of a shaft 56 which is revolved through shaft 35 by way of abelt drive 57, 58 and moves to and fro a suitable feeding memberengaging the strip. This same shaft also causes the upward movement ofthe depositing table 15 by way of a bevel gear pair 59, said tablehaving connected to it for that purpose a cylinder 61 revolved by thebevel gear pair 59, said cylinder'being screwed upward with the aid of aspindle groove on a fixed projection 62.

Guide 31 for the carrying-away of the finished thread packs 30 may bedisposed also in the direction of coiling mandrel 10, as may be seenfrom Figure 7.

What is claimed as new, is:

1. A method for preparing thread packs consisting of layers beingcomposed of flat pressed, longitudinal helicoidal thread windings theend turns of which are separated by separating strips, each layer beingformed by coiling the thread on a coiling mandrel of oblong rectangularsection upon moving it relatively round said mandrel in helicoidalfashion, holding stationary the central portion of the windings,withdrawing the coiling mandrel out-of the windings and pressing flatthe stripped off coil, thereby placing the individual windings in such'away that they are superimposed in scale like fashion to one another.

2. A method according to claim 1, in which the upper parts of thethread-coils being shifted with relation to the lower parts in thedirection of coiling before stripping olf in'order to'produce ascale-like overlapping of the thread coils.

3. A method according to claim 1, in which two separating strips, afterstripping off, are placed over the end turns of the thread, and haveprojecting edges glued to the separating strips of the preceding threadlayer.

4. A method according to claim 1, in which two .separating strips, afterstripping elf, are placed over the end turns of the thread and haveprojecting edges glued to the separating strips of the preceding threadlayer, said 'glueing being effected with the aid of a heated pressingmember and the use of an adhesive sensitive to heat.

'5. A method according to claim 1, in which each stripped off layer ofthreads is turned in its plane by degrees relative to the coilingmandrel previous to initiat- -ing the next following thread layer.

6. In an apparatus for preparing thread packs composed of separatelayers of fiat .pressed, longitudinal helicoidal thread-windings the endturns of which are separated by separating strips, 2. coiling mandrel ofrectangul'ar sectiongmean's adapted to slidably arrange said coilingmandrel in a horizontal plane, a thread dispensing mecha nism, including.a bobbin and a thread guide, means adapted to'rotate sai'd threaddispensing mechanismiround said coiling mandrel upon coiling the threadon the mandrel in a helicoidal fashion, means adapted to strip oif thecoiled ithread layer from the mandrel, and means adapted to holdstationary the said layer in its center during stripping off. a

7. Iii-an apparatus according'to claim '6, said means for holdingstationary the coiled thread layer consisting of a depositing tablearranged below said coiling mandrel, and a retaining tongue'usuallyarranged'out of the way of the mandrel, means adapted to raise and lowersaid depositing table, and means to place said retaining tongue abovesaid mandrel and to lower it upon the center ofthe coiledlaycr, in orderto softly clamp the layer on said depositing table.

8. In an apparatus according to claim 6, said coiling mandrel beingfork-shaped each fork prong consisting of two partsfmeansadaptedto shiftsaid two parts relatively to one another in longitudinal direction, andmeans adapted to move them one to the other crosswise to theirlongitudinal direction, in such a way, that the circumference of thecoiling mandrel, regarded in a transverse plane is being reduced.

9. In an apparatus according to claim 6, said coiling mandrel beingfork-shaped each fork prong consisting of two parts, embodying two rodsof circle-segmental shape in section having outer partially cylindricalsurfaces for guiding the end turns of the coiled thread, means adaptedto dispose them hingelike relative to one another and to shift them oneto another, inner edges of said two parts of said prongs resting in thecircle centers of the sector shaped sections, and means to move saidinner edges in a direction transverse to their longitudinal direction inorder to change the cross sectional area of the coiling mandrel.

10. In an apparatus according to claim 6, said means for holdingstationary the coiled thread layer consisting of a depositing tablearranged below said coiling mandrel, and a retaining tongue usuallyarranged out of the way of the mandrel, means adapted to raise and lowersaid depositing table, and means adapted to place said retaining tongueabove said mandrel and to lower it towards the center of the coiledlayer, in order to softly clamp the layer on said depositing table,consisting of two prongs, said mandrel each being composed of an upperand lower part, means adapted to reduce the cross sectional area of themandrel by approaching said upper to said lower parts and to shift theupper parts in relation to the lower parts in longitudinal direction,and means adapted to withdraw said coiling mandrel out of the clampedlayer.

11. In an apparatus according to claim 6, a depositing table receivingthe stripped 01f layers one above the other, and means adapted to turnsaid table together with the deposited layers by 90 degrees to or frobefore depositing the following layer.

12. In an apparatus according to claim 6, said means for holdingstationary the layer of threads including a deposit table, a pressingmember for upward and downward movement provided above said deposittable and designed to connect the separating strips between the layerswith one another.

13. In an apparatus according to claim 6, said means for holdingstationary the layer of threads including a deposit table, a pressingmember for upward and downward movement provided above said deposittable and designed to connect the separating strips between the layerswith one another, said separating strips having the form of twoseparating strips, means adapted to introduce said strips between saidpressing member and the uppermost layer, said pressing member having aninner part designed to operate within the range of the end turns of thethread layers, and equipped with means to suck the introduced strips andto press them onto the end turns, and an exterior part of said pressingmember, designed to operate within the outer portions of said separatingstrips provided with glue, and adapted to glue same to the previouslylocated separating strips.

14. In an apparatus according to claim 6, said means for holdingstationary the coiled thread layer containing a deposit table and aretaining tongue, a pressing member adapted to connect the separatingstrips with each other said separating strips having the form of twostrips, means for feeding and cutting off said strips, said table,tongue, pressing member and strip feeding and cutting means, beingarranged symmetrically with the vertical center plane of the coilingmandrel, a feeding mechanism for the base frames of the thread packs,and a discharge for the finished thread packs both being situated in avertical plane transverse to the center plane of the coiling mandrel.

15. In an apparatus according to claim 6, said means for holdingstationary the coiled thread layer including a deposit table designed toreceive the finished layers stacked on its top layer by layer, and meansfor ejecting the finished thread packs from the table.

References Cited in the file of this patent UNITED STATES PATENTS393,874 Wood Dec. 4, 1888 2,313,696 Yates Mar. 9, 1943 2,551,098 ConeMay 1, 1951

